/* ============================================================
   Transmission Terminology Flashcards — Game Styles
   All rules scoped to #flashcard-container to prevent
   Bootstrap conflicts (same pattern as other games).
   ============================================================ */

/* ── Layout ───────────────────────────────────────────── */
#flashcard-container {
    display: flex;
    flex-wrap: wrap;
    min-height: calc(100vh - 80px);
    background: #0f172a;
    color: #e2e8f0;
    font-family: 'Segoe UI', system-ui, sans-serif;
}

#flashcard-container .fc-sidebar {
    width: 280px;
    min-width: 280px;
    background: #1e293b;
    border-right: 1px solid #334155;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#flashcard-container .fc-sidebar-header {
    padding: 20px 16px 12px;
    border-bottom: 1px solid #334155;
    flex-shrink: 0;
}

#flashcard-container .fc-sidebar-header h3 {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #64ffda;
    margin: 0 0 10px;
}

#flashcard-container .fc-search {
    width: 100%;
    background: #0f172a;
    border: 1px solid #334155;
    border-radius: 6px;
    padding: 7px 10px;
    color: #e2e8f0;
    font-size: 0.82rem;
    outline: none;
    transition: border-color 0.2s;
}

#flashcard-container .fc-search:focus {
    border-color: #64ffda;
}

#flashcard-container .fc-search::placeholder {
    color: #64748b;
}

#flashcard-container .fc-term-list {
    list-style: none;
    margin: 0;
    padding: 8px 0;
    overflow-y: auto;
    flex: 1;
}

#flashcard-container .fc-term-list::-webkit-scrollbar {
    width: 4px;
}

#flashcard-container .fc-term-list::-webkit-scrollbar-track {
    background: #1e293b;
}

#flashcard-container .fc-term-list::-webkit-scrollbar-thumb {
    background: #334155;
    border-radius: 2px;
}

#flashcard-container .fc-term-list li a {
    display: block;
    padding: 6px 16px;
    font-size: 0.8rem;
    color: #94a3b8;
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
    border-left: 2px solid transparent;
    line-height: 1.4;
}

#flashcard-container .fc-term-list li a:hover {
    background: #0f172a;
    color: #64ffda;
    border-left-color: #64ffda;
}

/* ── Main Area ─────────────────────────────────────────── */
#flashcard-container .fc-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

/* ── Deck Selection Screen ─────────────────────────────── */
#flashcard-container .fc-deck-select {
    padding: 40px;
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
}

#flashcard-container .fc-deck-select h1 {
    font-size: 2rem;
    font-weight: 800;
    color: #f8fafc;
    margin-bottom: 6px;
}

#flashcard-container .fc-deck-select .fc-subtitle {
    color: #94a3b8;
    margin-bottom: 32px;
    font-size: 0.95rem;
}

#flashcard-container .fc-deck-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 14px;
    margin-bottom: 28px;
}

#flashcard-container .fc-deck-card {
    background: #1e293b;
    border: 2px solid #334155;
    border-radius: 12px;
    padding: 18px 16px;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s, transform 0.15s;
    user-select: none;
    position: relative;
}

#flashcard-container .fc-deck-card:hover {
    border-color: #64ffda;
    background: #243447;
    transform: translateY(-2px);
}

#flashcard-container .fc-deck-card.selected {
    border-color: #64ffda;
    background: #1a3a35;
}

#flashcard-container .fc-deck-card .fc-check {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid #334155;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    font-size: 0.7rem;
}

#flashcard-container .fc-deck-card.selected .fc-check {
    background: #64ffda;
    border-color: #64ffda;
    color: #0f172a;
}

#flashcard-container .fc-deck-card .fc-deck-name {
    font-weight: 700;
    font-size: 0.9rem;
    color: #f1f5f9;
    margin-bottom: 6px;
    padding-right: 24px;
    line-height: 1.3;
}

#flashcard-container .fc-deck-card .fc-deck-count {
    font-size: 0.75rem;
    color: #64748b;
}

/* Custom user decks: footer actions + flex so footer sits at bottom of tile */
#flashcard-container .fc-deck-card[data-deck-id^="custom-"] {
    display: flex;
    flex-direction: column;
    align-items: stretch;
}

#flashcard-container .fc-deck-card[data-deck-id^="custom-"] .fc-deck-custom-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
    margin-top: auto;
    padding-top: 10px;
    margin-left: -4px;
    margin-right: -4px;
    border-top: 1px solid #334155;
}

#flashcard-container .fc-deck-custom-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    font-size: 0.68rem;
    font-weight: 600;
    border-radius: 6px;
    border: 1px solid #475569;
    background: #0f172a;
    color: #94a3b8;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s, background 0.15s;
}

#flashcard-container .fc-deck-custom-btn:hover {
    color: #e2e8f0;
    border-color: #64748b;
    background: #1e293b;
}

#flashcard-container .fc-deck-custom-btn--add {
    border-color: #0d9488;
    color: #5eead4;
}

#flashcard-container .fc-deck-custom-btn--add:hover {
    background: #134e4a;
    color: #ccfbf1;
}

#flashcard-container .fc-deck-custom-btn--delete:hover {
    border-color: #b45309;
    color: #fb923c;
}

#flashcard-container .fc-deck-card.selected .fc-deck-count {
    color: #64ffda;
}

#flashcard-container .fc-select-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

#flashcard-container .fc-selected-count {
    color: #94a3b8;
    font-size: 0.88rem;
}

#flashcard-container .fc-selected-count strong {
    color: #64ffda;
}

#flashcard-container .btn-select-all,
#flashcard-container .btn-clear-all {
    background: none;
    border: 1px solid #334155;
    color: #94a3b8;
    border-radius: 6px;
    padding: 5px 12px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

#flashcard-container .btn-select-all:hover,
#flashcard-container .btn-clear-all:hover {
    border-color: #64748b;
    color: #e2e8f0;
}

#flashcard-container .btn-start {
    background: #64ffda;
    color: #0f172a;
    border: none;
    border-radius: 10px;
    padding: 14px 36px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s, transform 0.15s, opacity 0.2s;
    letter-spacing: 0.02em;
}

#flashcard-container .btn-start:hover:not(:disabled) {
    background: #4dd9b8;
    transform: translateY(-1px);
}

#flashcard-container .btn-start:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ── Game Area ─────────────────────────────────────────── */
#flashcard-container .fc-game-area {
    padding: 30px 40px;
    max-width: 840px;
    margin: 0 auto;
    width: 100%;
    display: none;
}

#flashcard-container .fc-game-area.active {
    display: block;
}

#flashcard-container .fc-game-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

#flashcard-container .fc-game-header h2 {
    font-size: 1.05rem;
    font-weight: 600;
    color: #94a3b8;
    margin: 0;
}

#flashcard-container .fc-deck-badge {
    background: #1e3a5f;
    color: #64ffda;
    border-radius: 6px;
    padding: 3px 10px;
    font-size: 0.75rem;
    font-weight: 600;
}

#flashcard-container .btn-back-decks {
    background: none;
    border: 1px solid #334155;
    color: #94a3b8;
    border-radius: 6px;
    padding: 5px 12px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

#flashcard-container .btn-back-decks:hover {
    border-color: #64748b;
    color: #e2e8f0;
}

/* Progress bar */
#flashcard-container .fc-progress-wrap {
    margin-bottom: 28px;
}

#flashcard-container .fc-progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: #64748b;
    margin-bottom: 6px;
}

#flashcard-container .fc-progress-info .fc-mastered-label {
    color: #64ffda;
    font-weight: 600;
}

#flashcard-container .fc-progress-bar-track {
    height: 6px;
    background: #1e293b;
    border-radius: 3px;
    overflow: hidden;
}

#flashcard-container .fc-progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #64ffda, #3b82f6);
    border-radius: 3px;
    transition: width 0.5s ease;
    width: 0%;
}

/* ── Flashcard (3D Flip) ──────────────────────────────── */
#flashcard-container .fc-card-scene {
    perspective: 1000px;
    margin-bottom: 28px;
}

#flashcard-container .fc-card {
    width: 100%;
    min-height: 260px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.4, 0.2, 0.2, 1);
    cursor: pointer;
}

#flashcard-container .fc-card.flipped {
    transform: rotateY(180deg);
    cursor: default;
}

#flashcard-container .fc-face {
    position: absolute;
    width: 100%;
    min-height: 260px;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 36px 40px;
    box-sizing: border-box;
}

#flashcard-container .fc-front {
    background: linear-gradient(135deg, #1e3a5f 0%, #1e40af 100%);
    border: 1px solid #2563eb;
}

#flashcard-container .fc-front .fc-term-text {
    font-size: 2rem;
    font-weight: 800;
    color: #f8fafc;
    text-align: center;
    line-height: 1.2;
    margin-bottom: 14px;
}

#flashcard-container .fc-front .fc-hint {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.45);
    text-align: center;
    display: flex;
    align-items: center;
    gap: 6px;
}

#flashcard-container .fc-back {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    transform: rotateY(180deg);
    justify-content: flex-start;
    align-items: flex-start;
}

#flashcard-container .fc-back .fc-back-deck {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #3b82f6;
    margin-bottom: 12px;
    background: #eff6ff;
    padding: 3px 10px;
    border-radius: 4px;
    align-self: flex-start;
}

#flashcard-container .fc-back .fc-back-term {
    font-size: 1rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 12px;
}

#flashcard-container .fc-back .fc-def-text {
    font-size: 0.92rem;
    color: #334155;
    line-height: 1.65;
    text-align: left;
}

/* ── Action Buttons (1–5 rating) ────────────────────────── */
#flashcard-container .fc-actions {
    display: none;
    gap: 8px;
    justify-content: center;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

#flashcard-container .fc-actions.visible {
    display: flex;
}

#flashcard-container .fc-btn-rate {
    flex: 1;
    max-width: 110px;
    padding: 10px 6px;
    border: 2px solid;
    border-radius: 10px;
    font-weight: 700;
    cursor: pointer;
    background: transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    transition: transform 0.15s, opacity 0.2s, background 0.15s;
}

#flashcard-container .fc-btn-rate .fc-rate-num {
    font-size: 1.15rem;
    line-height: 1;
}

#flashcard-container .fc-btn-rate .fc-rate-label {
    font-size: 0.65rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

#flashcard-container .fc-btn-rate[data-rating="1"] { color: #ef4444; border-color: #ef4444; }
#flashcard-container .fc-btn-rate[data-rating="2"] { color: #f97316; border-color: #f97316; }
#flashcard-container .fc-btn-rate[data-rating="3"] { color: #eab308; border-color: #eab308; }
#flashcard-container .fc-btn-rate[data-rating="4"] { color: #14b8a6; border-color: #14b8a6; }
#flashcard-container .fc-btn-rate[data-rating="5"] { color: #22c55e; border-color: #22c55e; }

#flashcard-container .fc-btn-rate:hover {
    transform: translateY(-2px);
    opacity: 0.88;
}

#flashcard-container .fc-btn-rate[data-rating="1"]:hover { background: rgba(239,68,68,0.08); }
#flashcard-container .fc-btn-rate[data-rating="2"]:hover { background: rgba(249,115,22,0.08); }
#flashcard-container .fc-btn-rate[data-rating="3"]:hover { background: rgba(234,179,8,0.08); }
#flashcard-container .fc-btn-rate[data-rating="4"]:hover { background: rgba(20,184,166,0.08); }
#flashcard-container .fc-btn-rate[data-rating="5"]:hover { background: rgba(34,197,94,0.08); }

/* ── Ranked (personal score) deck cards ────────────────── */
#flashcard-container .fc-deck-card.ranked-deck {
    border-left: 4px solid var(--score-color, #64ffda);
}

#flashcard-container .fc-ranked-badge {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--score-color, #64ffda);
    margin-bottom: 6px;
}

/* ── Ranked section heading ─────────────────────────────── */
#flashcard-container .fc-ranked-section {
    margin-top: 36px;
}

#flashcard-container .fc-section-label {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #64748b;
    margin: 0 0 6px;
}

#flashcard-container .fc-section-sublabel {
    color: #475569;
    font-size: 0.8rem;
    margin: 0 0 16px;
}

/* Empty/disabled score deck cards */
#flashcard-container .fc-deck-card.empty {
    opacity: 0.4;
    cursor: default;
}

#flashcard-container .fc-deck-card.empty:hover {
    border-color: #334155;
    background: #1e293b;
    transform: none;
}

/* ── Card Counter & Remaining ──────────────────────────── */
#flashcard-container .fc-card-info {
    text-align: center;
    font-size: 0.8rem;
    color: #475569;
}

/* ── Completion Screen ─────────────────────────────────── */
#flashcard-container .fc-completion {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 40px;
    min-height: 300px;
}

#flashcard-container .fc-completion.visible {
    display: flex;
}

#flashcard-container .fc-completion .fc-trophy {
    font-size: 4rem;
    margin-bottom: 16px;
}

#flashcard-container .fc-completion h2 {
    font-size: 1.8rem;
    font-weight: 800;
    color: #f8fafc;
    margin-bottom: 8px;
}

#flashcard-container .fc-completion p {
    color: #94a3b8;
    margin-bottom: 28px;
    font-size: 0.95rem;
}

#flashcard-container .btn-restart,
#flashcard-container .btn-new-deck {
    padding: 12px 28px;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
}

#flashcard-container .btn-restart {
    background: #64ffda;
    color: #0f172a;
    border: none;
    margin-right: 10px;
}

#flashcard-container .btn-new-deck {
    background: none;
    border: 2px solid #334155;
    color: #94a3b8;
}

#flashcard-container .btn-restart:hover {
    background: #4dd9b8;
}
#flashcard-container .btn-new-deck:hover {
    border-color: #64748b;
    color: #e2e8f0;
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 768px) {
    #flashcard-container {
        flex-direction: column;
    }

    #flashcard-container .fc-sidebar {
        width: 100%;
        min-width: unset;
        max-height: 180px;
        border-right: none;
        border-bottom: 1px solid #334155;
    }

    #flashcard-container .fc-term-list {
        display: flex;
        flex-wrap: wrap;
        padding: 6px 8px;
        gap: 4px;
    }

    #flashcard-container .fc-term-list li a {
        padding: 4px 10px;
        border-left: none;
        border-radius: 4px;
        background: #0f172a;
        border: 1px solid #334155;
        white-space: nowrap;
        font-size: 0.72rem;
    }

    #flashcard-container .fc-deck-select,
    #flashcard-container .fc-game-area {
        padding: 20px 16px;
    }

    #flashcard-container .fc-front .fc-term-text {
        font-size: 1.4rem;
    }

    #flashcard-container .fc-deck-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* ── Custom decks management (logged-in) ───────────────── */
#flashcard-container .fc-custom-panel {
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 12px;
    padding: 16px 18px 20px;
    margin-bottom: 24px;
}

#flashcard-container .fc-custom-create-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin-bottom: 0;
}

#flashcard-container .fc-custom-create-row input {
    flex: 1;
    min-width: 180px;
    max-width: 360px;
    background: #0f172a;
    border: 1px solid #334155;
    border-radius: 8px;
    padding: 8px 12px;
    color: #e2e8f0;
    font-size: 0.88rem;
}

#flashcard-container .fc-custom-create-row button {
    background: #64ffda;
    color: #0f172a;
    border: none;
    border-radius: 8px;
    padding: 8px 16px;
    font-weight: 700;
    font-size: 0.82rem;
    cursor: pointer;
}

#flashcard-container .fc-custom-create-row button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#flashcard-container .fc-custom-muted {
    color: #64748b;
    font-size: 0.75rem;
}

/* Guest CTA — anonymous users (custom decks upsell) */
#flashcard-container .fc-guest-cta {
    background: #1e293b;
    border: 1px solid #334155;
    border-left: 3px solid #64ffda;
    border-radius: 12px;
    padding: 14px 16px 16px;
    margin-bottom: 24px;
}

#flashcard-container .fc-guest-cta-text {
    margin: 0;
    font-size: 0.88rem;
    line-height: 1.55;
    color: #94a3b8;
}

#flashcard-container .fc-guest-cta-lead {
    display: block;
    color: #e2e8f0;
    font-weight: 700;
    margin-bottom: 4px;
    font-size: 0.9rem;
}

#flashcard-container .fc-guest-cta-actions {
    display: block;
    margin-top: 10px;
}

#flashcard-container .fc-guest-cta-primary {
    color: #64ffda;
    font-weight: 700;
    text-decoration: none;
    border-bottom: 1px solid rgba(100, 255, 218, 0.35);
}

#flashcard-container .fc-guest-cta-primary:hover {
    color: #99f6e4;
    border-bottom-color: #99f6e4;
}

#flashcard-container .fc-guest-cta-sep {
    color: #475569;
    margin: 0 6px;
}

#flashcard-container .fc-guest-cta-secondary {
    color: rgba(197, 160, 5, 0.95);
    font-weight: 600;
    text-decoration: none;
    border-bottom: 1px solid rgba(197, 160, 5, 0.35);
}

#flashcard-container .fc-guest-cta-secondary:hover {
    color: #e4c96b;
    border-bottom-color: rgba(228, 201, 107, 0.7);
}

/* Bootstrap modals (add card / delete deck) — dark theme */
#flashcard-container .fc-modal-dark.modal-content {
    background: #1e293b;
    color: #e2e8f0;
    border: 1px solid #334155;
}

#flashcard-container .fc-modal-dark .modal-header .modal-title {
    color: #f8fafc;
    font-size: 1.05rem;
}

#flashcard-container .fc-modal-dark .fc-modal-input {
    background: #0f172a;
    border: 1px solid #334155;
    color: #e2e8f0;
}

#flashcard-container .fc-modal-dark .fc-modal-input:focus {
    border-color: #64ffda;
    box-shadow: 0 0 0 0.15rem rgba(100, 255, 218, 0.2);
}

#flashcard-container .fc-modal-dark .fc-modal-btn-primary {
    background: #64ffda;
    color: #0f172a;
    border: none;
    font-weight: 700;
}

#flashcard-container .fc-modal-dark .fc-modal-btn-primary:hover {
    background: #5ce0c8;
    color: #0f172a;
}

#flashcard-container .fc-modal-dark #fc-modal-delete-deck-msg {
    color: #cbd5e1;
    line-height: 1.5;
}

/* ── SLD symbol decks (One-Line Academy integration) ───── */
#flashcard-container .fc-deck-card--sld {
    border-color: rgba(59, 130, 246, 0.45) !important;
    background: linear-gradient(145deg, rgba(30, 64, 175, 0.12) 0%, rgba(15, 23, 42, 0.95) 100%);
}

#flashcard-container .fc-deck-subtitle {
    font-size: 0.72rem;
    color: #93c5fd;
    margin: 0.15rem 0 0.35rem;
}

#flashcard-container .fc-deck-cta {
    font-size: 0.85rem;
    color: #94a3b8;
    margin: 0 0 1rem;
    text-align: center;
}

#flashcard-container .fc-deck-cta a {
    color: #64ffda;
}

#flashcard-container .fc-front--symbol {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    background: linear-gradient(160deg, #f8fafc 0%, #e0e7ff 100%);
    border: 2px solid rgba(30, 64, 175, 0.35);
}

#flashcard-container .fc-front--symbol .fc-hint {
    color: #475569;
}

#flashcard-container .fc-sld-symbol-front {
    padding: 1rem;
    border-radius: 10px;
    background: #fff;
    border: 1px solid rgba(30, 64, 175, 0.25);
}

#flashcard-container .fc-sld-symbol-back {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
    margin-bottom: 0.75rem;
    padding: 0.5rem;
    border-radius: 8px;
    background: rgba(30, 64, 175, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

#flashcard-container .fc-sld-symbol-label {
    font-size: 0.72rem;
    color: #93c5fd;
    font-weight: 600;
}

#flashcard-container .fc-sld-ola-link {
    margin: 0.75rem 0 0;
    font-size: 0.8rem;
}

#flashcard-container .fc-sld-ola-link a {
    color: #64ffda;
    font-weight: 600;
}